How do you partition ibook G4?

i have a ibook g4 that my friend whipped everything off and made three partitions. the first two i have no idea what they are and the third one is linux. When i boot up the mac it goes into ubuntu asking if i want to boot to linux or CDROM. If i just leave it, it loads to another screen looking like a command prompt called yaboot.

Is there a way i can just delete everything again because putting linux on here didnt even work, it doesnt even boot into it. It just says, "radeonfb 0000:00:10.0: Invalid ROM contents"

don't you need a set partition already for it to reconize the tiger disc? i think he has three partitions already for the ubuntu, yaboot, and linux. what i am wondering if its not reading the disc because there is no set partition for it to read and put the tiger into?

don't you need a set partition already for it to reconize the tiger disc? i think he has three partitions already for the ubuntu, yaboot, and linux. what i am wondering if its not reading the disc because there is no set partition for it to read and put the tiger into?

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You don't need to have it correctly partitioned before installation. I don't know why it won't boot from the disc.

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